Enhancement of chalcopyrite leaching by ferrous ions in acidic ferric sulfate solutions

被引：186

作者：

Hiroyoshi, N ^{[1
]}

Miki, H ^{[1
]}

Hirajima, T ^{[1
]}

Tsunekawa, M ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Engn, Sapporo, Hokkaido 0608628, Japan

来源：

HYDROMETALLURGY | 2001年 / 60卷 / 03期

关键词：

chalcopyrite; oxidation; leaching; ferrous ions; ferric ions; cupric ions; redox potential;

D O I：

10.1016/S0304-386X(00)00155-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of ferrous ions on chalcopyrite oxidation with ferric ions in 0.1 mol dm(-3) sulfuric acid solutions were investigated by leaching experiments at 303 K in nitrogen. With high cupric ion concentrations, the chalcopyrite oxidation was enhanced by high concentrations of ferrous ions and copper extraction was mainly controlled by the concentration ratio of ferrous to ferric ions or the redox potential of solutions. Ferrous ions, however, suppressed the chalcopyrite oxidation when cupric ion concentrations were low. A reaction model, which involves chalcopyrite reduction to intermediate Cu2S by ferrous ions and oxidation of the Cu2S by ferric ions, was proposed to interpret the results. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：185 / 197

页数：13

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